Here's the definition that's on our security deposit page, which doesn't get into the nitty-gritty: Normal wear and tear is a term that Wisconsin law does not define.
(3)Protein Fat-Free Percentage, Protein Fat-Free Content, PFF Percentage, PFF Content or PFF of a product means the meat protein (indigenous to the raw, unprocessed pork cut) content expressed as a percent of the non-fat portion of the finished product.
The US has no federal law banning the eating of horse or dog meat. As far as I know, most states don't either. States have various provisions about what meat is permitted to be sold and how it is handled, mostly for public health reasons. California is the only state that prohibits the sale of horses for the purpose of slaughter; there are about a dozen or so states that prohibit the sale of horse meat.